From 844e959e81c881fdcb7ac174e4c5c18f0e5ce804 Mon Sep 17 00:00:00 2001
From: Adam Sitnik <adam.sitnik@gmail.com>
Date: Wed, 4 Jul 2018 14:13:09 +0200
Subject: [PATCH] set DOTNET_MULTILEVEL_LOOKUP=0 to get customDotNetCli path
 working, fixes #820

---
 .../Toolchains/DotNetCli/DotNetCliCommandExecutor.cs         | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/BenchmarkDotNet/Toolchains/DotNetCli/DotNetCliCommandExecutor.cs b/src/BenchmarkDotNet/Toolchains/DotNetCli/DotNetCliCommandExecutor.cs
index 73e13e618e..c777e5e496 100644
--- a/src/BenchmarkDotNet/Toolchains/DotNetCli/DotNetCliCommandExecutor.cs
+++ b/src/BenchmarkDotNet/Toolchains/DotNetCli/DotNetCliCommandExecutor.cs
@@ -96,6 +96,8 @@ internal static string GetDotNetSdkVersion()
         internal static ProcessStartInfo BuildStartInfo(string customDotNetCliPath, string workingDirectory, string arguments,
             IReadOnlyList<EnvironmentVariable> environmentVariables = null, bool redirectStandardInput = false)
         {
+            const string dotnetMultiLevelLookupEnvVarName = "DOTNET_MULTILEVEL_LOOKUP";
+
             var startInfo = new ProcessStartInfo
             {
                 FileName = customDotNetCliPath ?? "dotnet",
@@ -112,6 +114,9 @@ internal static ProcessStartInfo BuildStartInfo(string customDotNetCliPath, stri
                 foreach (var environmentVariable in environmentVariables)
                     startInfo.EnvironmentVariables[environmentVariable.Key] = environmentVariable.Value;
 
+            if (!string.IsNullOrEmpty(customDotNetCliPath) && (environmentVariables == null || !environmentVariables.Any(envVar => envVar.Key == dotnetMultiLevelLookupEnvVarName)))
+                startInfo.EnvironmentVariables[dotnetMultiLevelLookupEnvVarName] = "0";
+
             return startInfo;
         }
     }